I have a one hour video of a speaker pacing on a stage. A temporary lighting engineer really screwed me by upsetting the lighting grid and creating severe variations [in the order of a full f/stop] in the lighting levels. No problem I thought, just use track fx levels and even out the exposure. I did just that, Vegas made it easy. Now that I'm done in evening out the brightness I feel I need to nudge the overall levels a bit. Going back into the keyframes and adjusting over 100 instances isn't really appealing, so I thought "why not chain another instance of levels fx on the track and set the adjustment there?" Only it doesn't seem to work. I know I can always render the video and apply track fx to it again, but if there's something I'm missing that I can do, it would save me some time in this project.